28871207 has 8 divisors (see below), whose sum is σ = 29565696. Its totient is φ = 28180152.

The previous prime is 28871197. The next prime is 28871231. The reversal of 28871207 is 70217882.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 28871207 - 2¹⁰ = 28870183 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28871267) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25148 + ... + 26270.

It is an arithmetic number, because the mean of its divisors is an integer number (3695712).

Almost surely, 2^28871207 is an apocalyptic number.

28871207 is a deficient number, since it is larger than the sum of its proper divisors (694489).

28871207 is a wasteful number, since it uses less digits than its factorization.

28871207 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1717.

The product of its (nonzero) digits is 12544, while the sum is 35.

The square root of 28871207 is about 5373.1933707992. The cubic root of 28871207 is about 306.7761881708.

The spelling of 28871207 in words is "twenty-eight million, eight hundred seventy-one thousand, two hundred seven".